Products Catalog
Model DBB brakes are spring applied, pressure released, disc style brakes. They develop equal torque in either direction of rotation. Their torque and thermal capacities allow them to be used in the most demanding applications.

Brake construction and operation is shown in the figure. Pressurizing the brake compresses the brake springs and withdraws the clamping plates from the brake discs. Standard brakes are furnished with either one or two discs, which are free to move axially.

Model DBB uses amore
Unit of Measure

Features

N/A Low inertia friction disc assembly.
Reduces the overall inertia that must be stopped.

Optional split friction discs.
Allows removal of friction discs without disturbing other components of drive system in mid-shaft brake arrangement.

Long wearing, self lubricating PolyPak seals.
Eliminates premature twisting failure and requires no external lubrication.

Where Used

N/A

  • Bottling equipment
  • Power Shovels
  • Conveyors
  • Shears
  • Power Presses

Specifications

Model

325DBBS

Dimension D

17.96 in456 mm

Dimension D1

12.00 in381 mm

Dimension D31

1.75 in44 mm

Dimension D44

0.25 in6 mm

Dimension D45

1.00 in25 mm

Dimension H16

11.50 in292 mm
Dimension J1 30.630 in778.0 mm

Dimension J1

24.375 in619.1 mm

Dimension J2

30.89 in785 mm

Dimension O2

1/2-14 NPT

Minimum Bore

6.13 in156 mm

Maximum Bore

7.38 in187 mm

Dynamic Torque Rating

455000 lb·in51.372 Nm

Disc & Gear (Inertia)

309 lb·ft²1303 kg·m²

Disc & Gear (Weight)

682 lb310 kg

Housing (Weight)

720 lb1585 kg
Minimum Releasing Pressure2 90 psi6.2 bar

Maximum Speed

1700 rpm

Manufacturer

Eaton-Airflex

Actuation

Spring Applied, Air Release

Note

N/A Tolerance +0.120/-0.120 in (+3.00/-3.00 mm)
Brake in disengaged position.
Basic part number only. Does not include gear. Gear must be ordered separately with bore and keyway requirements.

  • 1 Tolerance +0.000/-0.005 in (+0.00/-0.08 mm)
  • 2 Maximum allowable cylinder pressure is 120 psi (8.3 bar).